Summary of the Organization, Description of Business and Significant Accounting Policies - Summary of Status of Stock Options Granted (Detail) (USD $)	12 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of Options, Outstanding, Beginning Balance	433,438	645,050
Number of options, granted
Number of options, exercised	(247,440)	(5,000)
Number of options, forfeited
Number of options, expired		(206,612)
Number of options, outstanding, ending balance	185,998	433,438	645,050
Weighted avg. exercise price, outstanding, beginning balance	$ 5.14	$ 4.43
Number of options, exercisable	185,998
Weighted avg. exercise price, granted
Weighted avg. exercise price, exercised	$ 3.67	$ 2.97
Weighted avg. exercise price, forfeited
Weighted avg. exercise price, expired		$ 2.97
Weighted avg. exercise price, Outstanding, ending Balance	$ 7.09	$ 5.14	$ 4.43
Weighted avg. remaining contractual term, outstanding	1 year 18 days	1 year 5 months 12 days	1 year 9 months 26 days
Weighted avg. exercise price, exercisable	$ 7.09
Weighted avg. remaining contractual term, exercisable	1 year 18 days	1 year 5 months 12 days	1 year 9 months 26 days
Aggregate intrinsic value, outstanding, beginning balance	$ 0	$ 0
Aggregate intrinsic value, outstanding, ending balance	442,148	0	0
Aggregate intrinsic value, exercisable	$ 442,148

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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